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arm: mach-k3: am62p: Fixup a53 max cpu frequency by speed-grade

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AM62P SoC has multiple speed grades. Add function to delete
non-relevant CPU frequency nodes, based on the information
retrieved from hardware registers. Fastest grade's maximum
frequency also depends on PMIC voltage, hence to simplify
implementation use the smaller value.

Signed-off-by: Aparna Patra <a-patra@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
This commit is contained in:
Aparna Patra
2025-01-08 10:19:38 +05:30
committed by Tom Rini
parent a226a6422c
commit 8d05cbef73
2 changed files with 31 additions and 0 deletions
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12
arch/arm/mach-k3/am62px/am62p5_fdt.c
View File

@@ -74,12 +74,24 @@ static void fdt_fixup_thermal_zone_nodes_am62p(void *blob, int maxc)
}
}
static void fdt_fixup_cpu_freq_nodes_am62p(void *blob, int max_freq)
{
if (max_freq >= 1250000000)
return;
if (max_freq <= 1000000000) {
fdt_del_node_path(blob, "/opp-table/opp-1250000000");
fdt_del_node_path(blob, "/opp-table/opp-1400000000");
}
}
int ft_system_setup(void *blob, struct bd_info *bd)
{
fdt_fixup_cores_wdt_nodes_am62p(blob, k3_get_core_nr());
fdt_fixup_video_codec_nodes_am62p(blob, k3_has_video_codec());
fdt_fixup_canfd_nodes_am62p(blob, k3_has_canfd());
fdt_fixup_thermal_zone_nodes_am62p(blob, k3_get_max_temp());
fdt_fixup_cpu_freq_nodes_am62p(blob, k3_get_a53_max_frequency());
fdt_fixup_reserved(blob, "tfa", CONFIG_K3_ATF_LOAD_ADDR, 0x80000);
fdt_fixup_reserved(blob, "optee", CONFIG_K3_OPTEE_LOAD_ADDR, 0x1800000);

19
arch/arm/mach-k3/include/mach/am62p_hardware.h
View File

@@ -26,6 +26,8 @@
#define JTAG_DEV_CANFD_SHIFT 15
#define JTAG_DEV_VIDEO_CODEC_MASK BIT(14)
#define JTAG_DEV_VIDEO_CODEC_SHIFT 14
#define JTAG_DEV_SPEED_MASK GENMASK(10, 6)
#define JTAG_DEV_SPEED_SHIFT 6
#define JTAG_DEV_TEMP_MASK GENMASK(5, 3)
#define JTAG_DEV_TEMP_SHIFT 3
@@ -118,6 +120,23 @@ static inline int k3_get_max_temp(void)
return JTAG_DEV_TEMP_EXTENDED_VALUE;
}
static inline char k3_get_speed_grade(void)
{
u32 dev_id = readl(CTRLMMR_WKUP_JTAG_DEVICE_ID);
u32 speed_grade = (dev_id & JTAG_DEV_SPEED_MASK) >>
JTAG_DEV_SPEED_SHIFT;
return 'A' - 1 + speed_grade;
}
static inline int k3_get_a53_max_frequency(void)
{
if (k3_get_speed_grade() == 'O')
return 1000000000;
else
return 1250000000;
}
#if defined(CONFIG_SYS_K3_SPL_ATF) && !defined(__ASSEMBLY__)
static const u32 put_device_ids[] = {};